Hi Ivan, I've other Win10 laptops and PCs and I've not issues.
The problem is the NIC's driver.
Why, I don't found a reason, the upload work for 20MB, then a long pause, other 20 MB, another long pause, etc...
But I must ask to NIC vendo, not only here, because this NAS, with Linux, works perfectly...
If you have some idea, please share it with me.
Thank you.
It doesn't look as if Microsoft has fixed their Samba upload problem with win10 yet.